Restore the vanilla nif files (I do this by opening nifskope, going to file, browse archive, go to your skyrim data folder, open Skyrim Meshes.bsa, then in nifskope click armor, scroll down to wolf, double click bodym_0 then file > save as > save to your wolf folder, do the same thing for bodym_1)

Load up the Creation Kit with the appropriate esm

Find the Wolf Armor Cuirass in armor addons (if I'm not mistaken I believe it's actually named companions armor or something like that in the creation kit)

Duplicate it and double click to open

Change the name to skimpywolfAA or whatever you choose, and change the nif file to the skimpy one

Close the dialogue box and go to armors (not armor addon like before), find the wolf armor (once again think the file name has companion in it)

Duplicate that, open it and change the name

Delete the armor addon, right click, choose new

Type the name of the armor addon you made in step 6, double click it

Close the dialogue box and save your esp (really you should save after doing everything because the Creation Kit isn't kind)